The public download comes once the app is signed and notarised by Apple, so your Mac opens it without a warning. Until then we send test versions to speakers who want to try it and tell us what they think.
Ask for early accessFor macOS 13 or newer. Your phone needs only its browser. 10 free shows, then a licence (pricing). SpeakingWizard tells you when a new version is out; it never installs anything by itself.